Well, tired of sweeping up rat turds out of the coop, plus the added fear of them hurting my girls because they are obviously the size of a small cat..I resorted to Motemco Brand green "Hawk Pellets"..no, not for hawks, but they are supposed to eradicate rats like a hawk. I sprinkled a generous portion in the 2 holes where I thought they were entering and covered the holes with rocks. Upon inspection yesterday morning, all of the pellets were gone and I happily swept green rat turds out of the coop! It's supposed to take a few days, so I hope to be nearing the end! P.S. No risk of secondary poisoning of the chickens!